What this means
The IEEE assigned the MA-S block 70B3D5749 to Granite River Labs Inc. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 70:B3:D5:74:9, it is Granite River Labs Inc hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D5749?
70B3D5749 is registered to Granite River Labs Inc in the IEEE MA-S registry.
What does the MA-S registry type mean?
An MA-S assignment, formerly called OUI-36, covers 36 bits, giving the vendor 4,096 device addresses, the smallest block the IEEE issues. Granite River Labs Inc's block covers 4,096 addresses.
What devices use 70B3D5749?
Any network device with a MAC address starting 70:B3:D5:74:9 was manufactured by or for Granite River Labs Inc.